package com.mubai.common.utils;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.TimeUnit;

/**
 * 线程相关工具类.
 * @author baichuanping
 * @create 2019-01-02
 */
public class Threads {
	public static final Logger logger = LoggerFactory.getLogger("sys-user");

	/**
	 * sleep等待,单位为毫秒
	 * @param milliseconds
	 */
	public static void	sleep(long milliseconds) {
		try {
			Thread.sleep(milliseconds);
		} catch (InterruptedException e) {
			return;
		}
	}

	/**
	 * 停止线程池
	 * 先使用shutdown, 停止接收新任务并尝试完成所有已存在任务.
	 * 如果超时, 则调用shutdownNow, 取消在workQueue中Pending的任务,并中断所有阻塞函数.
	 * 如果仍人超時，則強制退出.
	 * 另对在shutdown时线程本身被调用中断做了处理.
	 * @param pool
	 */
	public static void shutdownAndAwaitTermination(ExecutorService pool) {
		if (pool != null && !pool.isShutdown()) {
			pool.shutdown();
			try {
				if (!pool.awaitTermination(120, TimeUnit.SECONDS)){
					logger.info("Pool did not terminate");
				}
			} catch (InterruptedException ie) {
				pool.shutdown();
				Thread.currentThread().interrupt();
			}
		}
	}

}
